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Diesel engine will not rev over 2000
Posted: Mon Feb 18, 2019 9:15 pm
by marktomblin
Hi guys I am new here so hope I have put this question in the right place .
My 1995 diesel bongo will not rev past 2000 rpm it was given to me as it was just sat in a field I managed to get it started easy enough and there wasn’t much wrong as regards bits being siezed etc. I have given everything I can see a liberal dose of WD 40 and all linkages seem to work but floor it and it sticks at 2000 rpm it ticks over fine and temp gauge stays in the middle no horrible smoke . Am at a loss as to what else to try please help all the best mark
Re: Diesel engine will not rev over 2000
Posted: Tue Feb 19, 2019 10:27 am
by mikeonb4c
There's a little pipe i believe that runs i think from the turbo to the fuel pump. If it has fallen off etc it produces exactly the symptoms you describe. Hopefully a techie on here can give a better description, or have a search of old threads as its been discussed before. And take a look around there to see if you can identify anything that looks disconnected. Good luck and keep us posted.
Re: Diesel engine will not rev over 2000
Posted: Tue Feb 19, 2019 10:32 am
by marktomblin
Thanks will check that I cannot run the engine until my new heater pipe comes will report back after weekend though cheers mark
Re: Diesel engine will not rev over 2000
Posted: Tue Feb 19, 2019 11:04 am
by Bob
Well remembered Mike.
Re: Diesel engine will not rev over 2000
Posted: Tue Feb 19, 2019 5:04 pm
by francophile1947
Mine was the same with partially blocked banjo filter.
Re: Diesel engine will not rev over 2000
Posted: Tue Feb 19, 2019 5:36 pm
by marktomblin
Thanks John will check that at weekend really appreciate the feedback all the best mark
Re: Diesel engine will not rev over 2000
Posted: Fri Feb 22, 2019 6:37 pm
by marktomblin
Well today I checked for pipes loose or off I couldn’t find any, my new fuel filter arrived so I fitted it .....now the blighter will hardly run at all there is a weird buzzing noise from somewhere near the back of the engine when you press the throttle pedal down about half way with just the ignition switch on .The engine will start but only just it’s obviously a fuel problem but what . Is there a fuel pump on these before the fuel filter? I have put in two gallons of premier diesel I have now run out of ideas any help would be much appreciated thanks mark.
Re: Diesel engine will not rev over 2000
Posted: Sat Feb 23, 2019 11:32 am
by mikeonb4c
marktomblin wrote: Fri Feb 22, 2019 6:37 pm
Well today I checked for pipes loose or off I couldn’t find any, my new fuel filter arrived so I fitted it .....now the blighter will hardly run at all there is a weird buzzing noise from somewhere near the back of the engine when you press the throttle pedal down about half way with just the ignition switch on .The engine will start but only just it’s obviously a fuel problem but what . Is there a fuel pump on these before the fuel filter? I have put in two gallons of premier diesel I have now run out of ideas any help would be much appreciated thanks mark.
Did you check the banjo filter (not the same as the main fuel filter).
Re: Diesel engine will not rev over 2000
Posted: Mon Mar 04, 2019 9:25 pm
by marktomblin
mikeonb4c wrote: Sat Feb 23, 2019 11:32 am
marktomblin wrote: Fri Feb 22, 2019 6:37 pm
Well today I checked for pipes loose or off I couldn’t find any, my new fuel filter arrived so I fitted it .....now the blighter will hardly run at all there is a weird buzzing noise from somewhere near the back of the engine when you press the throttle pedal down about half way with just the ignition switch on .The engine will start but only just it’s obviously a fuel problem but what . Is there a fuel pump on these before the fuel filter? I have put in two gallons of premier diesel I have now run out of ideas any help would be much appreciated thanks mark.
Did you check the banjo filter (not the same as the main fuel filter).
HI AGAIN big thankyou I have removed the filter from the bango and low and behold the engine now runs great really good info much appreciated mike see you at one of the meetings. I still have a load of things to do before I get it back on the road it has now gone to have its wheel arches welded and a load of mot work. after all it was stood in a field for 4 years. all the best mark
Re: Diesel engine will not rev over 2000
Posted: Mon Mar 04, 2019 11:51 pm
by mikeonb4c
Excellent news
Re: Diesel engine will not rev over 2000
Posted: Tue Mar 05, 2019 4:58 pm
by francophile1947
Glad I was right
Re: Diesel engine will not rev over 2000
Posted: Tue Mar 05, 2019 5:26 pm
by marktomblin
That’s why your a supreme being John thanks very much we are looking forward to getting it on the road...
Re: Diesel engine will not rev over 2000
Posted: Tue Mar 05, 2019 6:17 pm
by g8dhe
Hopefully you cleaned and replaced the Banjo filter, not just left it OUT!
Re: Diesel engine will not rev over 2000
Posted: Tue Mar 05, 2019 6:29 pm
by marktomblin
No I left it out on the advise of a diesel fitter apparently this is a very common fault and the guy said they usually throw them , I have kept mine though.
Re: Diesel engine will not rev over 2000
Posted: Tue Mar 05, 2019 11:42 pm
by g8dhe
I wonder why Mazda fitted an item that wasn't needed when it was designed ?????
Yes fitters leave them out cause they can't charge much for sorting that problem, whilst they can charge more for sorting out the result of the burnt rubbish left in your cylinders, exhaust manifold etc.
